A Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-Based Composite as Separator Coating for Stable Li-S Batteries



Yi, Ruowei, Zhao, Yinchao, Liu, Chenguang, Sun, Yi, Zhao, Chun, Li, Yinqing, Yang, Li and Zhao, Cezhou
(2022) A Ti<sub>3</sub>C<sub>2</sub>T<sub>x</sub>-Based Composite as Separator Coating for Stable Li-S Batteries. NANOMATERIALS, 12 (21). 3770-.

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Abstract

The nitrogen-doped MXene carbon nanosheet-nickel (N-M@CNi) powder was successfully prepared by a combined process of electrostatic attraction and annealing strategy, and then applied as the separator coating in lithium-sulfur batteries. The morphology and structure of the N-M@CNi were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Raman spectrum, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), and nitrogen adsorption-desorption method. The strong LiPS adsorption ability and high conductivity are associated with the N-doped carbon nanosheet-Ni modified surface. The modified separator offers the cathode of Li-S cell with greater sulfur utilization, better high-rate adaptability, and more stable cycling performance compared with the pristine separator. At 0.2 C the cell with N-M@CNi separator delivers an initial capacity of 1309 mAh g<sup>-1</sup>. More importantly, the N-M@CNi separator is able to handle a cathode with 3.18 mg cm<sup>-2</sup> sulfur loading, delivering a capacity decay rate of 0.043% with a high capacity retention of 95.8%. Therefore, this work may provide a feasible approach to separator modification materials towards improved Li-S cells with improved stability.

Item Type: Article
Uncontrolled Keywords: MXene, carbon nanosheets, lithium-sulfur batteries, modified separator
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 16 Feb 2023 17:13
Last Modified: 17 Oct 2023 11:45
DOI: 10.3390/nano12213770
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3168459